District of Columbia water supply: hearing before the Subcommittee on Government Efficiency and the District of Columbia of the Committee on Governmental Affairs, United States Senate, Ninety-sixth Congress, first session, October 10, 1979

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District of Columbia water supply: hearing before the Subcommittee on Government Efficiency and the District of Columbia of the Committee on Governmental Affairs, United States Senate, Ninety-sixth Congress, first session, October 10, 1979